Whitespace and change default user

modules/exploits/multi/http/phpmyadmin_preg_replace.rb

@@ -56,8 +56,8 @@ class Metasploit3 < Msf::Exploit::Remote
 
 		register_options(
 			[
-				OptString.new('TARGETURI',      [ true, "Base phpMyAdmin directory path", '/phpmyadmin/']),
-				OptString.new('USERNAME', [ true, "Username to authenticate with", 'admin']),
+				OptString.new('TARGETURI', [ true, "Base phpMyAdmin directory path", '/phpmyadmin/']),
+				OptString.new('USERNAME', [ true, "Username to authenticate with", 'root']),
 				OptString.new('PASSWORD', [ false, "Password to authenticate with", ''])
 			], self.class)
 	end